1031201021 has 8 divisors (see below), whose sum is σ = 1076495424. Its totient is φ = 985944960.

The previous prime is 1031200979. The next prime is 1031201069. The reversal of 1031201021 is 1201021301.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1031201021 is a prime.

It is a super-2 number, since 2×1031201021² = 2126751091422884882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1031200993 and 1031201011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031201071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54605 + ... + 71021.

It is an arithmetic number, because the mean of its divisors is an integer number (134561928).

Almost surely, 2^1031201021 is an apocalyptic number.

It is an amenable number.

1031201021 is a deficient number, since it is larger than the sum of its proper divisors (45294403).

1031201021 is a wasteful number, since it uses less digits than its factorization.

1031201021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19171.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 1031201021 is about 32112.3188356120. The cubic root of 1031201021 is about 1010.2940100825.

Adding to 1031201021 its reverse (1201021301), we get a palindrome (2232222322).

The spelling of 1031201021 in words is "one billion, thirty-one million, two hundred one thousand, twenty-one".